Stock engine bay pictures please? 1977 gmc

[68chevy68]

I have a long bed gmc with 19000 original miles and would like to keep the engine bay looking origibal. Some vacuum line have come off and I am not sure where they all go. I dont have an assymbly manual. Thanks in advance guys.

[68chevy68]

no takers?...Come on guys,,,,,this truck needs some love...







I even have the origial tires and hub caps.....

[flamingbig10]

not bad looking truck just needs a little tlc and do have any pics of the motor and vacuum lines I might be able to help and I 19,000 miles it hard to believe maybe 1 or 2 might be in front of the 19,000

[pig rig]

here's some so so pictures from a 78 I have setting out back

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[AceX]

Check this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=187680

[dswancutt]

Does it still have the emissions label on the core support. It should have a two letter code which will tell what emissions package it has. From that I can get the vacuum diagram from my shop manual and try to e-mail to you.

[babyJay]

Originally Posted by flamingbig10

not bad looking truck just needs a little tlc and do have any pics of the motor and vacuum lines I might be able to help and I 19,000 miles it hard to believe maybe 1 or 2 might be in front of the 19,000

I would have to agree with Aaron here, I doubt seriously that's 19000, but I can say that gold inlay trim is worth some cash. You will have a tough time, if not impossible to find the piece to fix the right front fender (trim wise).

[whiskeydented]

It looks like it might only have 19000 to me. The bench seat looks like its in pretty good shape. I had a jetta once, less than a year old and about 15000 miles. I ended up getting 500 for it when I sold it. It looked a lot worse than that. The stories that car could tell. lol.

[68chevy68]

This is a 19000 mile original truck. It was my wifes grandmas and has not been driven for some time. She did have a little fender bender as you can see. I will take some more pictures of the inside as well as the engine compartment. the jack is not under the hood as original. Her grandpa took it out and placed it in a paper sack in the tool box with some oil on it. Its perfect. I will check to see what emisions package it has. I just rebuilt the quadrajet and it was a California model whatever that means. I will have pictures shortly. Thanks for all your help.

[babyJay]

Most of that vacuum emissions stuff can be removed if your state doesn't do inspections or state law forbid it. Bare mimimum requirements is vac advance, brake booster, PCV valve, and Auto trans modulator.

[68chevy68]

I know I could remove them, but everything is in good shape and its such a low milage truck. I remove everything possible on everything else lol.

[68chevy68]

Here are some more pictures of this truck.





Looks like some chalk marks still on the fire wall to me...

[68chevy68]

and some more...

[babyJay]

Damn...I believe you.

[68chevy68]

Thanks! I was looking at a quadrajet book I had and have figured out some of the vacuum lines. Still need to know where the ones on the intake go from the passenger side. There are two lines.

[babyJay]

I really wish I could help you out here, but I'm a "remove it all" kinda guy. That truck has a lot going for it, I see a diamond in the rough here. Maybe we can get a mod to move it to the engine forum?

[454HO]

Piggly Wiggly grocery bag and a Louisiana inspection sticker. I gotta ask, where is the truck from? My birthtown is Haynesville, about 13 miles south of the Arkansas state line on Hwy 79.

[68chevy68]

Its from Springhill LA. Probably about 13 miles from you. lol. It sit there at my wifes grandma's house for a while. I put an edelbrock carb on it, a fuel pump, some rubber lines, and the tires and wheels you see in the pictures. The original tires had flat spots in them and I did not want to drive her home that way. It drove just fine. Needs a tune up and maybee a power steering pump, but otherwise drives good. I have had it for about 4 years now and have not beed able to drive it due to title reasons, but that is about to change.

[rod86]

certainly a neat truck, but get that damage fixed and it will be even better...

[454HO]

Originally Posted by 68chevy68

Its from Springhill LA. Probably about 13 miles from you. lol.

Small world. I've been to Springhill many times. I live in Houston now, but still go to Haynesville ocassionally to visit relatives.

[Husker C20]

1978 c20 with stock motor.

[77K10Silverado]

1977 K10 stock 350 4bbl.

[Oldriginal86]

FYI, there is a complete set of 77 trim on CL in my area.

[TylerW]

Well, I can probably help you. I am not a "toss it" guy and just spent 2 months restoring the 350 in my truck back to as close to stock as possible. It's the same LS9 350-4bbl you have.

This is a list of the devices that operate by vacuum on your truck:

1. Early fuel evaporation valve, diverts exhaust under the carb when cold. That's the silver can beside the passenger-side valve cover. I see the vacuum line on it, which should lead to the 2-port valve in the intake to the passenger side of the thermostat housing. The other hose on that valve should lead to a connection on the front passenger side of the carb.

2. EGR valve. Located beside and slightly rearward of the passenger side of the carb. There should be a line leading from that to the vacuum switch mounted in the thermostat housing. From there, another line leads to a connection on the carb adjacent to the EFE port described earlier.

3. Distributor vacuum advance. Mounted on the distributor. A line should lead from there directly to the ported vacuum port on the front of the carb, toward the driver side, about halfway up.

4. Air cleaner temperature switch. One line connects to the vacuum port located at the rear bottom of the carb, slightly to the passenger side. It goes to one port on the bottom of the air cleaner, the other line goes from the second port to the valve on the air cleaner snorkel.

Your charcoal canister looks like it is connected. One line marked TANK goes to the hardline in the vicinity of the power steering pump, the other leads up to the engine and tees into the line that runs between the bottom of the carb, front, and the PCV valve in the left side valve cover.

This should get you straightened out, and LOL at the guys with pics from 6ft away, thanks for trying to help him though.

PS...what "vacuum emissions stuff"?? I wish people understood this stuff better. This truck runs the vacuum advance straight off the carb, and the temperature vacuum switches only exist to 1. make sure the EFE valve only closes when the engine is cold, and 2. make sure the EGR doesn't work until the engine warms up. No sinister "horsepower-sucking valves" or performance-lowering vacuum lines". That stuff didn't start happening until the early 80's....those trucks are a different story entirely.

And besides..the mighty LS9 350 he and I both have is rated at a whopping 165 horsepower. Whatever horsepower there was has already been sucked out of it before it left the assembly line.

If you need help with the automatic choke let me know, that's another one guys would rather pump the gas for 10 minutes than to understand and repair.

[TylerW]

77K10Silverado:

Your truck has the heavy-duty emissions package, didn't know if you knew that or not.

That's why it has the old-style(and correct) Quadrajet with no bowl vent and no charcoal canister. Also no EFE valve. The only thing it does have is that temperature vacuum switch on the thermostat housing which probably advances the timing via the can when the temp gets high in order to cool the engine down from a higher idle. It also has HD cooling with the 7-blade fan. How come it's apart in the second pic?

The LIGHT-DUTY emissions package in these years is almost identical to the 305 and 350 found in passenger cars of the same years.